Intro to XR Assessment

Quiz

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Beginner

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+60 XP

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25m

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Unity Technologies

In this quiz, you will be tested on all the things you have learnt within the 'How Google Cardboard Brought VR to the Masses' project.

Question 1

What does the "X" in XR stand for?

Select only one

eXtra reality

eXtended reality

eXpanded reality

It is a placeholder for other prefixes

Question 2

Which type of XR is arguably the least familiar to the general public?

Select only one

Question 3

Aside from holographic AR, what other type of AR is there?

Select only one

Photogrammatic AR, which uses marker-based information

Holosonic AR, which is the audio equivalant of holograpich AR

In-Video AR, which uses a video feed instead of a holographic overlay

360 video

Question 4

The Kinect and Leap Motion are examples of what kind of video?

Select only one

Depth based video

Infrared video

Webcam video

Green screen video

Question 5

What is Motion to Photon Latency?

Select only one

How long it takes for your eyes to see something that’s moving

The time between moving your head and seeing the result

A VR technique that calculates the amount of motion at each pixel so it can selectively reduce quality there

In quantum physics, the time between when a photon hits a surface, and and emitted photon leaves

Question 6

What three components are in an IMU?

Select only one

Barometer, Gyroscope, Anemometer

Accelerometer, GPS, Gyroscope

Accelerometer, Gyroscope, Magnetometer

Accelerometer, GPS, Magnetometer

Question 7

What happens when you try to use IMU information to calculate position tracking?

Select only one

The results drift over time because of error accumulation.

The results get more accurate over time as the algorithm learns how to do the calculations better.

The results eventually go to infinity because of positive feedback.

The calculations cause the IMU to consume more power and overheat, slowing it down.

Question 8

What is spatialized audio and how does it differ from normal stereo?

Select only one

It mixes sounds for each ear based on the tracking information.

It’s a fancy name for surround sound.

It’s a design theory that means you have to space out your sound sources to keep from confusing the user.

Music composers need to position the instruments in their compositions with different sounds coming from different places.

Question 9

What does GPU stand for?

Select only one

Graphical Processing Unit

Generic Processing Unit

Graphics Performance Unit

Graphical Projection Utility

Question 10

Why can’t the stereoscopic view just be duplicated for both eyes?

Select only one

It can, but it’s faster to just draw it twice than to copy it

Because the camera needs to be moved slightly for each eye

Because each eye focuses at a different distance

Each eye needs a different set of color adjustments

Question 11

What is pincushion distortion and why is it intentionally built in to some VR optics?

Select only one

Pincushion distortion expands the field of view of an image that was intentionally compressed using barrel distortion.

Studies show that distorting the view in certain ways convinces your brain it’s in a larger space than it really is.

Molds used to make cheap plastic lenses leave marks where the lens is pushed out and it causes a type of distortion called ‘pincushion distortion.’

By causing distortion near the edges of your vision you’re less likely to get motion sickness.

Question 12

Why is it important that the lens spacing match the user's IPD?

Select only one

It’s not that important but a great marketing feature.

It keeps the user from going cross eyed.

If it doesn’t match they will not experience the best image clarity.

The stereoscopic effect will not take hold if it’s not correct.

Submit answers

To calculate your score, submit your answers to the quiz. A passing score will mark this quiz complete.

Correct answers needed to pass

8/12

Retake allowed after

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